IT System Engineer

Company Description
Un-Available, founded in 2004 and based in Vietnam, is a garment manufacturer that collaborates with leading global streetwear and fashion brands. The company is committed to creating lasting change by redefining industry standards and promoting sustainability within the garment sector. Focused on environmental initiatives and workforce well-being, Un-Available is dedicated to building a better future.
Role Description
Own and maintain the Company's core IT infrastructure, including physical/virtual servers, network, firewall/VPN, identity infrastructure, endpoint infrastructure, backup/DR, server room, CCTV/fingerprint systems and related technical controls.
Act as the technical escalation and infrastructure owner: troubleshoot complex incidents, perform root-cause analysis, supervise suppliers/maintenance, maintain documentation and ensure infrastructure is secure, monitored, recoverable and supportable.
Main task:
Monitor server logs, health, capacity and performance; administer Windows Server, Active Directory, virtualization platforms, storage systems and basic Linux servers.
Maintain server room, UPS and infrastructure monitoring systems (Zabbix or equivalent); investigate and resolve alerts proactively.
Monitor Internet bandwidth, network availability and performance; troubleshoot recurring connectivity issues.
Administer LAN/WAN, VLAN, Wi-Fi, routing, multi-site connectivity, firewalls, VPN, MFA and network segmentation.
Maintain CCTV infrastructure, recording systems and network connectivity; coordinate vendor support when required.
Maintain network cabling, patching, topology diagrams and infrastructure documentation; support network improvement projects.
Prepare infrastructure budgets, technical specifications and recommendations for servers, storage, network, security and related IT equipment.
Administer AD/Entra identity services, access controls, authentication systems and endpoint security management.
Maintain fingerprint/attendance systems, integrations and technical configurations; coordinate maintenance and repairs.
Evaluate suppliers, review quotations, compare technical solutions, warranties, SLAs and support infrastructure procurement activities.
Verify equipment specifications, acceptance testing, warranty records and technical documentation before production deployment.
Oversee IT asset inventory, labeling, stock control and asset lifecycle management.
Manage IT equipment provisioning, user access requests and privileged access administration following security standards.
Oversee equipment handover, return, reassignment and secure decommissioning processes.
Monitor warranty status and maintenance activities for servers, networks, CCTV, UPS, storage and other critical infrastructure.
Diagnose complex infrastructure incidents, perform root cause analysis and provide technical escalation support.
Define repair scope, evaluate vendor proposals and implement corrective and preventive actions.
Supervise vendor maintenance, validate service quality and maintain backup, recovery and configuration management processes.
Verify systems after maintenance or changes, ensuring connectivity, security, monitoring and backup functions operate normally.
Manage employee offboarding processes, including access revocation, asset recovery, privileged account control, emergency access management and audit compliance.
Requirements
Bachelor's degree or equivalent in Information Technology, Computer Science, Network Engineering or a related field. - Minimum 3 years of hands-on experience in system, network or infrastructure administration/support. - Strong working knowledge of Windows Server, Active Directory/AD DS, DNS, DHCP, Group Policy, file services, LAN/WAN/Wi-Fi/VLAN, switching/routing, firewall/VPN, virtualization (VMware/Hyper-V or equivalent), backup/restore, NAS/storage and server-room/UPS infrastructure.
Understanding of endpoint security/device management, CCTV/fingerprint systems, infrastructure monitoring and disaster recovery.
Basic Linux administration is an advantage.
Strong troubleshooting and root-cause analysis.
Able to independently handle L2 incidents and critical infrastructure maintenance.
Able to technically evaluate suppliers, quotations, warranty/repair options and equipment specifications.
Good documentation, communication, prioritization and guidance skills.
Microsoft 365 and infrastructure administration/monitoring tools.
PowerShell or basic scripting knowledge is an advantage. - Able to read and understand English technical documentation and communicate on technical matters. - Responsible, careful, proactive and service-oriented.
Strong ownership and control mindset for infrastructure, assets and access.
Able to work under pressure during incidents and maintenance windows.
Willing to learn and continuously improve technical standards.
Benefits & Allowances:
Full social-insurance contributions based on agreed salary (after 2 months probation)
Annual salary review in December
12 days annual leave per Labour Law + 0.5-day per quarterly teambuilding leave.
24/7 personal health insurance
Annual health check-up 2 times per year
Working Environment
Casual dress code - comfortable clothes, personal style welcome
On-site gym/yoga/aerobics room
Sports clubs (e.g., badminton, soccer)
Company events: quarterly team-building, birthday gifts, X-Mas Party, Year-end party, Company trip
Holiday & special-occasion gifts (e.g., Woman day, Men day, Techer day, Mid-Autumn, New Year)
Other information
Working time: Mon - Fri, 8AM - 5PM
Location: Part of lot I, 3 Street No. 7, Vinh Loc Industrial Park, Binh Tan Ward, HCMC
**AT UN-AVAILABLE IS AN EQUAL OPPORTUNITY ORGANIZATION AND WILL NOT ALLOW DISCRIMINATION BASED UPON AGE, ETHNICITY, ANCESTRY, GENDER, NATIONAL ORIGIN, DISABILITY, RACE, SIZE, RELIGION, SEXUAL ORIENTATION, SOCIOECONOMIC BACKGROUND, OR ANY OTHER STATUS PROHIBITED BY APPLICABLE LAW.